Implement suspend() and resume() for OfflineAudioContext

Source/core/frame/UseCounter.h

 /*
  * Copyright (C) 2012 Google, Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 753 matching lines @@
         V8CustomEvent_InitCustomEvent_Method = 864,
         V8DeviceMotionEvent_InitDeviceMotionEvent_Method = 865,
         V8DeviceOrientationEvent_InitDeviceOrientationEvent_Method = 866,
         V8Event_InitEvent_Method = 867,
         V8KeyboardEvent_InitKeyboardEvent_Method = 868,
         V8MouseEvent_InitMouseEvent_Method = 869,
         V8MutationEvent_InitMutationEvent_Method = 870,
         V8StorageEvent_InitStorageEvent_Method = 871,
         V8TouchEvent_InitTouchEvent_Method = 872,
         V8UIEvent_InitUIEvent_Method = 873,
+        OfflineAudioContextStartRendering = 874,
+        OfflineAudioContextSuspend = 875,
+        OfflineAudioContextResume = 876,
 
         // Add new features immediately above this line. Don't change assigned
         // numbers of any item, and don't reuse removed slots.
         // Also, run update_use_counter_feature_enum.py in chromium/src/tools/metrics/histograms/
         // to update the UMA mapping.
         NumberOfFeatures, // This enum value must be last.
     };
 
     // "count" sets the bit for this feature to 1. Repeated calls are ignored.
     static void count(const Frame*, Feature);
@@ skipping 83 matching lines @@
 
     bool hasRecordedMeasurement(Feature feature) const { return m_countBits.hasRecordedMeasurement(feature); }
 
     CountBits m_countBits;
     BitVector m_CSSFeatureBits;
 };
 
 } // namespace blink
 
 #endif // UseCounter_h